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  <div class="section" id="dbm-fluidmixture-interface-tension">
<h1>dbm.FluidMixture.interface_tension<a class="headerlink" href="#dbm-fluidmixture-interface-tension" title="Permalink to this headline">¶</a></h1>
<dl class="method">
<dt id="dbm.FluidMixture.interface_tension">
<code class="sig-prename descclassname">FluidMixture.</code><code class="sig-name descname">interface_tension</code><span class="sig-paren">(</span><em class="sig-param">self</em>, <em class="sig-param">m</em>, <em class="sig-param">T</em>, <em class="sig-param">S</em>, <em class="sig-param">P</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/dbm.html#FluidMixture.interface_tension"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#dbm.FluidMixture.interface_tension" title="Permalink to this definition">¶</a></dt>
<dd><p>Computes the interfacial tension between gas/liquid and water</p>
<p>If <cite>air</cite> is False (thus, assume hydrocarbon), this method computes
the interfacial tension between the gas and liquid phases of the
mixture and water using equations in Danesh (1998) “PVT and Phase
Behaviour Of Petroleum Reservoir Fluids,” Chapter 8.  Otherwise, we
treat the fluid like air and use the surface tension of seawater from
Sharqawy et al. (2010), Table 6.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>m</strong><span class="classifier">ndarray, size (nc)</span></dt><dd><p>masses of each component in a mixture (kg)</p>
</dd>
<dt><strong>T</strong><span class="classifier">float</span></dt><dd><p>mixture temperature (K)</p>
</dd>
<dt><strong>P</strong><span class="classifier">float</span></dt><dd><p>mixture pressure (Pa)</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>sigma_p</strong><span class="classifier">ndarray, size (2)</span></dt><dd><p>interfacial tension for gas (row 1) and liquid (row 2) (N/m)</p>
</dd>
</dl>
</dd>
</dl>
</dd></dl>

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